add_histogram_sample_function_   58 src/counters.h     add_histogram_sample_function_ = f;
add_histogram_sample_function_   92 src/counters.h     if (!add_histogram_sample_function_) return;
add_histogram_sample_function_   93 src/counters.h     return add_histogram_sample_function_(histogram, sample);
add_histogram_sample_function_  101 src/counters.h   AddHistogramSampleCallback add_histogram_sample_function_;